AMD Ryzen Threadripper Pro 9985WX

Manufacturer: AMD

The AMD Ryzen Threadripper Pro 9985WX is a high-core-count desktop processor aimed at demanding workstation workloads. Built on a 4nm semiconductor process, it features 64 cores running at a base clock of 3.2 GHz across all cores, with turbo frequencies reaching up to 5.4 GHz. The chip supports 64-bit operation and includes an unlocked multiplier, giving system builders flexibility in configuration.

On the memory side, the 9985WX supports DDR5 RAM at speeds up to 6400 MHz across eight memory channels, with a maximum addressable memory capacity of 2000 GB and full ECC support. Cache resources are substantial, with 5120 KB of L1, 64 MB of L2, and 256 MB of L3 cache in total. The processor connects via PCIe 5.0 and carries a thermal design power rating of 350W, with a maximum operating temperature of 95°C. It supports multithreading across 128 threads and includes instruction set extensions such as AVX2, AES, FMA3, and SSE 4.2, among others. No integrated graphics are included. PassMark results show a multi-core score of 156305 and a single-core score of 4586.

Pros

Supports up to 2000 GB of DDR5 RAM across eight memory channels, enabling large-scale memory configurations for data-heavy workloads
ECC memory support allows for hardware-level error detection and correction, which is valuable in reliability-sensitive environments
128 threads across 64 cores allows for substantial parallel processing across heavily threaded tasks
256 MB of L3 cache reduces memory latency for workloads that benefit from keeping large data sets closer to the processor
Turbo clock speed reaches 5.4 GHz, allowing individual threads to run at elevated frequencies when needed
PCIe 5.0 support provides a high-bandwidth interface for compatible expansion hardware

Cons

350W TDP demands robust cooling and power delivery infrastructure, adding complexity to system builds
No integrated graphics means a discrete GPU is required for any display output
Does not use big.LITTLE heterogeneous core architecture, so all cores operate under a uniform design without efficiency-core power savings
At 95°C maximum operating temperature, thermal management is a critical consideration for sustained workloads

Who is this for?

This processor is well-matched for users running heavily threaded professional workloads such as 3D rendering, scientific simulation, video encoding, or large-scale data processing, where its 64 cores and 128 threads can be fully utilized. The support for up to 2000 GB of ECC DDR5 RAM across eight channels makes it particularly fitting for memory-intensive server-adjacent workstation tasks that also demand data integrity. Environments with the infrastructure to handle its 350W TDP — including robust cooling and high-capacity power delivery — will be able to sustain the processor through extended, demanding compute sessions.

Who is this NOT for?

This processor is a poor fit for general desktop or everyday computing use, where its 350W thermal envelope would result in unnecessary energy consumption and require cooling solutions far beyond what typical setups provide. Users focused on single-threaded or lightly threaded applications would see little benefit from 64 cores, as most of that capacity would remain idle. Additionally, since there is no integrated graphics, anyone needing a compact or display-ready system without a discrete GPU will find this chip insufficient for that purpose on its own.

General info:

Type	Desktop
Has integrated graphics	✕
Thermal Design Power (TDP)	350W
semiconductor size	4 nm
CPU temperature	95 °C
PCI Express (PCIe) version	5
Supports 64-bit	✓

The AMD Ryzen Threadripper Pro 9985WX is a desktop processor fabricated on a 4nm semiconductor process, with no integrated graphics included. It carries a Thermal Design Power (TDP) of 350W and a maximum operating temperature of 95°C, reflecting its substantial power requirements. The chip supports 64-bit computing and connects to the platform via PCIe 5.0, offering a modern high-bandwidth interface for compatible hardware.

Performance:

CPU speed	64 x 3.2 GHz
CPU threads	128 threads
turbo clock speed	5.4GHz
Has an unlocked multiplier	✓
L2 cache	64 MB
L3 cache	256 MB
L1 cache	5120 KB
L2 core	1 MB/core
L3 core	4 MB/core
Uses big.LITTLE technology	✕
clock multiplier	32

The processor runs 64 cores at a base clock of 3.2 GHz, supporting 128 threads in total, with turbo frequencies climbing to 5.4 GHz under boosted conditions. It features an unlocked multiplier set at 32, allowing for flexible clock adjustments. Cache is organized across three levels: 5120 KB of L1, 64 MB of L2 at 1 MB per core, and a substantial 256 MB of L3 cache at 4 MB per core. The processor does not use big.LITTLE heterogeneous core architecture, meaning all cores share a uniform design.

Benchmarks:

PassMark result	156305
PassMark result (single)	4586

In PassMark testing, the processor achieves a multi-core score of 156,305, reflecting its capacity for heavily threaded workloads across its 64 cores. The single-core PassMark result of 4,586 represents its per-core computational output under that benchmark methodology.

Integrated graphics:

Memory:

RAM speed (max)	6400 MHz
DDR memory version	5
memory channels	8
maximum memory amount	2000GB
Supports ECC memory	✓

The processor supports DDR5 memory at speeds up to 6400 MHz across eight memory channels, enabling substantial memory bandwidth for data-intensive tasks. It can address a maximum of 2000 GB of RAM in total, making it well-suited for configurations requiring large memory pools. ECC memory is also supported, which allows for error detection and correction at the hardware level.

Features:

instruction sets	MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
uses multithreading	✓
Has NX bit	✓

The processor supports multithreading and includes the NX bit for hardware-level memory protection against certain classes of malicious code execution. Its supported instruction sets span MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2, covering a broad range of extended operations including vectorized math, hardware-accelerated encryption, and floating-point processing.

Final Verdict

The AMD Ryzen Threadripper Pro 9985WX is a processor built around one purpose: sustained, large-scale computational work. Its 64-core architecture paired with 128 threads and up to 2000 GB of ECC DDR5 memory across eight channels positions it firmly within the workstation segment, where throughput, memory capacity, and data integrity carry more weight than compact power envelopes or plug-and-play simplicity. The demands it places on infrastructure — from cooling to power delivery — mean it is not a casual deployment, and the absence of integrated graphics reinforces that this chip belongs in purpose-built professional environments. For users whose workflows can genuinely leverage its core count and memory bandwidth, the 9985WX represents a processor with a clearly defined and well-executed scope.